2556338065078 has 64 divisors (see below), whose sum is σ = 4443109106688. Its totient is φ = 1080471093120.

The previous prime is 2556338065067. The next prime is 2556338065081. The reversal of 2556338065078 is 8705608336552.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 405057543 + ... + 405063853.

It is an arithmetic number, because the mean of its divisors is an integer number (69423579792).

Almost surely, 2^{2556338065078} is an apocalyptic number.

2556338065078 is a deficient number, since it is larger than the sum of its proper divisors (1886771041610).

2556338065078 is a wasteful number, since it uses less digits than its factorization.

2556338065078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7597.

The product of its (nonzero) digits is 36288000, while the sum is 58.

The spelling of 2556338065078 in words is "two trillion, five hundred fifty-six billion, three hundred thirty-eight million, sixty-five thousand, seventy-eight".